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June 19, 1923. 145239 W. H. NICKERSON SHANK STIFFENER Filed Nov. 16. 1922 lllllllllllllll' finne 17 with upwardly prjecig Spurs 25, mapd' to indent the mer surac 03' me m'er soie, as indicate& by dot-te& !ines in Figur@ 2 The Spurs 25' &te preembl struckp f om the partems 17, by dies Whc 1 saver zwp &dges of each spam' from the sheet memi and' form openinga 26. The pws thus forme& are ponied an sde, ami adptd 1539 be for'cad well inte the immer Saa, They ar preferaby aryanged in pa's, me

pgr beixg adj acent &e the end pmion 15'.

and the other io the end oron 16.

' A cmcton between i Ae stifexer ;m &he inner Sql& of suficen strength and reli&- blfiy, is provided by the Spurs 25.

The stifi'ener may be provide& With a pluralty of rbs, as ShOWD by 4:, ;m one I 01' more of the ribs may be mvde wh &he

Spurs 23.

I clam: 1. A Shoe-shami: shifemi" cemmmg from its under scle, asi& stfi'ener %sing clamcterzed by Spurs pw ecmg downwar vded Wi a longtunal rib projectifig mm ts under side, said sifener being' characerzed by Spurs prmectmg dowmvsrd ed &0 en aggs th& outs: sole and preven mmemem Q) &he stfener relative te *me out/cz ola; and by Spurs pwjectng upwarc from the upper surface of iha sifener besdefhe rdb, and adapted to engage te-nner sole m: prevent mm emem: of the stfiener reatve m ih & immer sal&

WBLLLM NICKERSUN. 

